Nothing specific, but see link below
What are the PA Laws regarding parents sleeping in the same bed with children of the opposite sex - is there an age limit?
As of June 2006 there were no restrictions within USCIS/HS/ICE regarding the marriage of close relatives immigrating here. However, there are many other restrictions related to the immigration of married couples. Also be aware that some states may have restrictive laws regarding the procreation of children by such married couples. Check with an attorney in the state where you reside.
There are no laws regarding sharing a room.
There are no laws regarding dating. There are laws regarding sexual contact, however, the age of consent is 16 in most places.
You may not marry your cousin. However, there are no laws against marrying your father's cousin.
They were now required to attend school more
as long as they are siblings
See Related Links (Home Alone Children and Legal Age Limits) for listing of states with laws and guidelines.
There are no laws regarding dating, but there are laws regarding sexual contact (which is not limited merely to intercourse).
They were now required to attend school more
Yes! Hermione ends up marrying Ron Weasly and have two children together. Harry actually marrying Ginny Weasly so Harry Potter and Hermione Granger end up being in-laws.
No. The fact that you were irresponsible enough to get pregnant and have a child does not make you an adult. All the laws regarding children still apply, even to children with children.